The Peculiar Properties of Economically Effective Technology of Forming of the Ceramic Coating Based on Aluminum Oxide

Abstract:

Increasing of the hardness and wear resistance of the working surfaces of parts made of aluminum and its alloys is achieved by modifying them by the method of micro-arc oxidation in alkalescent electrolytes. This technology consists in the formation of a highly hard and wear-resistant ceramic layer by means of the spark discharges and implies an enormous investment of energy and time. The finished product surface roughness in numerous cases fails to meet the requirements, and demands additional machining. High hardness of the hardened layer, at the same time causes an increased wear of the processing tool. A method in which the technological process is carried out in two stages allows improving energy efficiency of this technology. At the beginning, when using an electrolyte with a high content of liquid glass, a primary oxide layer, consisting predominantly of silicon oxide, is formed. At the next stage of micro arc oxidation, the content of the liquid glass in the electrolyte decreases, which allows the formation of predominantly high rigid aluminum oxide in ceramic layer. This technology can significantly reduce the time of formation of a coating and reduces energy consumption. To reduce the processing tool wear it is proposed to keep the surface of the modified by oxidation workpiece in hydrofluoric acid for 5 - 30 minutes. This operation allows to reduce the hardness of the upper layer, consisting mainly of silicates, without affecting the lower layer, formed mainly of aluminum oxide. As a result, it is possible to receive the required surface micro geometry with less tools wear, less time and energy. There was achieved a reduction of time for getting the finished product by 1.6 - 2.3 times, electricity by 2 - 2.7 times, tool wear by 8.7 - 12 times.

• Periodical: Key Engineering Materials (Volume 910)
• Pages: 514-520
• DOI: https://doi.org/10.4028/p-x6u74f
• Online since: February 2022
• Authors: Alexander N. Bolotov, Vladislav V. Novikov*, Olga O. Novikova
• Keywords: Ceramic Coating, Economically Efficient Technology, Friction, Machining, Micro Arc Oxidation, Tool Wear, Wear

References

[1] S. B. Abdollahi Boraei, M. Esmaeili Bidhendib, D. Afzali, Environ, Preparation of SiO2/ZrO2 ceramic nanocomposite coating on Aluminum alloys as metallic part of the photovoltaic cells and study its corrosion behavior, Energy Econ. Res. 1 (2017) 231–238.

[2] D. Zhang, Y. Zou, L. Wen, D. Wu, S. Zhang, S. Wang, Y. Wang, D. Wei, Y. Zhou, Liquid-phase plasma assisted electrophoresis and sintering SiC/hBN nanocomposite ceramic coating on aluminum alloy for radiative heat dissipation, Ceram. Int. 47 (2021) 9310-9316.

DOI: 10.1016/j.ceramint.2020.12.058

[3] Y. Zou, Y. Wang, D. Wei, Q. Du, J. Ouyang, D. Jia, Y. Zhou, In-situ SEM analysis of brittle plasma electrolytic oxidation coating bonded to plastic aluminum substrate: Microstructure and fracture behaviors, Mater. Charact. 156 (2019) 109851.

DOI: 10.1016/j.matchar.2019.109851

[4] A. Marchenko, V. Shpakovskyy, V. Volikov, Cordunum pistons increase diesel engine economy and reliability, Acta Innov. 33 (2019) 28–37.

DOI: 10.32933/actainnovations.33.3

[5] W. Yang, S. Wu, D. Xu, W. Gao, Y. Yao, Q. Guo, J. Chen, Preparation and performance of alumina ceramic coating doped with aluminum nitride by micro arc oxidation, Ceram. Int. 46 (2020) 17112–17116.

DOI: 10.1016/j.ceramint.2020.03.179

[6] Y. Chen, J. Zhou, H. Liu, X. Song, Y. Yang, Overall micro-arc oxidation treatment for AZ31B–6061 magnesium–aluminium dissimilar metal connecting parts, Corros. Eng. Sci. Technol. 52 (2017) 470–475.

DOI: 10.1080/1478422x.2017.1330800

[7] T. Wei, F. Yan, J. Tian, Characterization and wear- and corrosion-resistance of microarc oxidation ceramic coatings on aluminum, J. Alloys Compd. 389 (2005) 169–176.

DOI: 10.1016/j.jallcom.2004.05.084

[8] D. Qin, G. Xu, Y. Yang, S. Chen, Multiphase Ceramic Coatings with High Hardness and Wear Resistance on 5052 Aluminum Alloy by a Microarc Oxidation Method, ACS Sustain. Chem. Eng. 6 (2018) 2431–2437.

DOI: 10.1021/acssuschemeng.7b03883

[9] W. Xue, X. Wu, X. Li, H. Tian, Anti-corrosion film on 2024/SiC aluminum matrix composite fabricated by microarc oxidation in silicate electrolyte, J. Alloys Compd. 425 (2006) 302–306.

DOI: 10.1016/j.jallcom.2006.01.035

[10] M. A. Markov, A. D. Bykova, A. V. Krasikov, B. V. Farmakovskii, D. A. Gerashchenkov, Formation of Wear- and Corrosion-Resistant Coatings by the Microarc Oxidation of Aluminum, Refract. Ind. Ceram. 59 (2018) 207–214.

DOI: 10.1007/s11148-018-0207-3

[11] A. N. Bolotov, V. V Novikov, O. O. Novikova, A composite ceramic material for an abrasive tool, IOP Conf. Ser. Mater. Sci. Eng. 896 (2020) 012081.

DOI: 10.1088/1757-899x/896/1/012081

[12] A. Bolotov, V. Novikov, O. Novikova, Mineral Ceramic Composite Material: Synthesis and Friction Behavior, Met. Work. Mater. Sci. 22 (2020) 59–68.

[13] A.N. Bolotov, V.V Novikov, O.O. Novikova, Method for energy saving wear resistance ceramic coatings on aluminum and its alloys, New Mater. Technol. Mech. Eng. 12 (2012) 12–14.

[14] Z. Cagatay Oter, Y. Azakli, S. Cengiz, Y. Gencer, M. Tarakci, Microarc oxidation of pure aluminium in alumina containing electrolytes, Surf. Eng. 36 (2020) 837–846.

DOI: 10.1080/02670844.2019.1698162

[15] A. I. Volkov, I.M. ZHarskij, Large Chemical Directory, Modern school, Minsk, (2005).